Fastening device



FIG. 1 is a top plan view of the fastening device showing our new design;

FIG. 2 is a right side view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a top front perspective view thereof; and,

FIG. 8 is a top perspective view thereof showing the fastening device in a position of use.

The broken lines shown in the figures represent environmental subject matter that forms no part of the claimed design. 

CLAIM The ornamental design for a fastening device, shown and described. 